Heated gas distribution plate for a processing chamber
First Claim
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1. An apparatus for distributing gas in a processing system, comprising:
- a gas distribution assembly having;
a gas distribution plate comprising a flange portion disposed around the gas distribution plate and a bottom plate defining a plurality of holes through which gases are transmitted;
a gas box coupled to the gas distribution plate, the gas box being configured to supply the gases into the plurality of holes; and
an electrical heating element disposed inside the bottom plate for heating the bottom plate.
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Abstract
An apparatus for distributing gas in a processing system. In one embodiment, the system includes a gas distribution assembly having a gas distribution plate. The gas distribution plate defines a plurality of holes through which gases are transmitted. The assembly further includes a gas box coupled to the gas distribution plate, in which the gas box is configured to supply the gases into the plurality of holes. The assembly further includes a means for reducing heat transfer from the gas box to the gas distribution plate.
269 Citations
17 Claims
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1. An apparatus for distributing gas in a processing system, comprising:
a gas distribution assembly having;
a gas distribution plate comprising a flange portion disposed around the gas distribution plate and a bottom plate defining a plurality of holes through which gases are transmitted;
a gas box coupled to the gas distribution plate, the gas box being configured to supply the gases into the plurality of holes; and
an electrical heating element disposed inside the bottom plate for heating the bottom plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 13, 14, 15)
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8. A gas distribution assembly for a processing system, comprising:
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a gas distribution plate comprising a flange portion and a bottom plate defining a plurality of holes through which gases are transmitted;
a gas box coupled to the gas distribution plate through the flange portion, the gas box being configured to supply the gases into the plurality of holes;
an electrical heating element disposed inside the bottom plate for heating the bottom plate; and
a radio frequency (RF) gasket disposed between the flange portion of the gas distribution plate and the gas box forming a spacing therein to reduce the contact area between the gas distribution plate and the gas box, and thereby reducing heat transfer from the gas distribution plate to the gas box. - View Dependent Claims (9, 10, 11, 16, 17)
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12. The apparatus of claim wherein 3, the recesses provide a distance between the gas distribution plate and the gas box for complete separation, thereby reducing heat transfer from the gas distribution plate to the gas box.
Specification